[jira] [Created] (SPARK-24870) Cache can't work normally if there are case letters in SQL

["eaton (JIRA)" <ji...@apache.org>]

eaton created SPARK-24870:
-----------------------------

             Summary: Cache can't work normally if there are case letters in SQL
                 Key: SPARK-24870
                 URL: https://issues.apache.org/jira/browse/SPARK-24870
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 2.3.1
            Reporter: eaton


Cache can't work normally if there are case letters in SQL, 
for example:
 sql("CREATE TABLE IF NOT EXISTS src (key INT, value STRING) USING hive")

sql("select key, sum(case when Key > 0 then 1 else 0 end) as positiveNum " +
 "from src group by key").cache().createOrReplaceTempView("src_cache")
 sql(
 s"""select a.key
 from
 (select key from src_cache where positiveNum = 1)a
 left join
 (select key from src_cache )b
 on a.key=b.key
 """).explain

 

The subquery "select key from src_cache where positiveNum = 1" on the left of join can use the cache data, but the subquery "select key from src_cache" on the right of join cannot use the cache data.



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